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Issue:ISSN 1000-7083
          CN 51-1193/Q
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Your Position :Home->Past Journals Catalog->2008 Vol.27 No.6

Foraging Dynamic of Three Egrets in Farmlands
Author of the article:WANG Zhi-gao1, ZHOU Fang1*, YANG Mei2, ZHANG Yong1, LI Dong1, SU Bo3, LIANG Xiang-rong3
Author's Workplace:(1. College of Animal Science and Technology, Guangxi University, Nanning 530005, China; 2. Forestry College, Guangxi University; 3. Beilun Estuary National Nature Reserve)
Key Words:Chinese pond heron; little egret; cattle egret; foraging dynamic
Abstract:Studies on foraging dynamic of Chinese pond heron, little egret and cattle egret were conducted by the methods of instantaneous scanning sampling and focal-animal sampling at the Beilun Estuary National Nature Reserve, Fangchenggang in Guangxi Zhuang Autonomous Region in spring and summer 2007. The results showed that the numbers of foraging individuals in every fixed time were different from each other, and all the numbers in every fixed time presented a shape of "U" in the daytime of every egret. The feeding time for the foraging individuals of these three egrets in every fixed time were different from each other too. The difference between the numbers of foraging individuals, resting individuals in every fixed time, and the resting time of Chinese pond heron and cattle egret were very significant (F>F0.01), the difference between the foraging time of these two egrets were significant (F>F0.05). The difference between the foraging time and resting time of Chinese pond heron and little egret were significant (F>F0.05), but the difference between the numbers of foraging individuals and resting individuals in every fixed time of these two egrets were not significant (F<F0.05). The difference between the numbers of foraging individuals, resting individuals in every fixed time of little egret and cattle egret were significant (F>F0.05), but the difference between the foraging time and resting time of these two egrets were not significant (F<F0.05). The difference among the numbers of vigilance individuals, vigilance time and feeding frequency of the foraging individuals in every fixed time of these three egrets were not significant (F<F0.05). All the differences above made these three egrets possible to live in the same place.
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